From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1EFFEA71A4 for ; Mon, 20 Apr 2026 01:54:09 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fzT742b03z2xTh; Mon, 20 Apr 2026 11:54:08 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=115.124.30.111 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776650048; cv=none; b=cu9a3p77I/OgGJkw3Jg9NvWP5Dvzjbeavktht9Qv00WqUzNu8LEj4btV3Pq57P0D3YsGjIn68A337FpyLUMXgOVt0rMBCohKFL+AhAT8wXHiD4EbjEyUGOUAmXInJw7jaspFuZKNzUsof9WQX0Me9c/H48cv79RF1QBoNHl7PQbxI9kMbPaIiiPjhMYQfIG+2wH5MZidSe7OtNvsCTigKyjLhrZZt6yb/QHX+NC2cJD1aWcm2RoNhwwZy/YI9F/qMOOtOKzvtF7/sQMMZb9vKIEo9Wu6PNXyAZcgmakIBn3DGuCysZfNOgh1kAZ3uAl47IRoJw/IU/tLJUSBwnfqbQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776650048; c=relaxed/relaxed; bh=4RMnuNbO0/jQujtQ8lLINRmO/1eQ1Lo875lWkDVnl/A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=FkyqVje3Ca+K5VMqDud2GhE4HXVyx1aFe9odA9O4Uv8O2ZbxSsUSKbWX42WczN7RYg2WRHCuK72fUYG44ZfVCLSfEF94oD9HYLkVSEogB+bC27xySdx3TE6FzFXrNemwC2ytqRPUogK2qYnUwaejEG0wqtsmMAXgPmBuIyRIh9tbNGQuGK48Xe9sMlxGTn/cwfWHl4aW+MCSeiT843iYaHiH9R0AF0ZeBuLiFJhIkweLFC0ov8wt63bGplYYxWAjxuNiyL58ycQvAV5n15xc5ik/+BHGbQToDBInGtQwSxKxibcljiMDJth1wEw5WpVSKQy1RhNfnpw3zqKLY7wh/w== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; dkim=pass (1024-bit key; unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=xuSp+qD6; dkim-atps=neutral; spf=pass (client-ip=115.124.30.111; helo=out30-111.freemail.mail.aliyun.com; envelope-from=hsiangkao@linux.alibaba.com; receiver=lists.ozlabs.org) smtp.mailfrom=linux.alibaba.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=xuSp+qD6; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.alibaba.com (client-ip=115.124.30.111; helo=out30-111.freemail.mail.aliyun.com; envelope-from=hsiangkao@linux.alibaba.com; receiver=lists.ozlabs.org) Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fzT733VD9z2xSB for ; Mon, 20 Apr 2026 11:54:06 +1000 (AEST) DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1776650043; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=4RMnuNbO0/jQujtQ8lLINRmO/1eQ1Lo875lWkDVnl/A=; b=xuSp+qD6Cmj41jsaXsbNzLt6imT8ZZyiR2fW75pWvjicOHI1+98x1k4a0P1ZcB64QiE0slQDBFdnFw4GxbJ31nW9/Gv93tFirItx2cZKRA0Sb+nETqFFdU+t2xWqwbpLa1qdlBI5z8VcVI6kkVnmPyu+cZvt0n3cTqSrdGG79e0= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R671e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037009110;MF=hsiangkao@linux.alibaba.com;NM=1;PH=DS;RN=3;SR=0;TI=SMTPD_---0X1GZir3_1776650041; Received: from 30.221.130.173(mailfrom:hsiangkao@linux.alibaba.com fp:SMTPD_---0X1GZir3_1776650041 cluster:ay36) by smtp.aliyun-inc.com; Mon, 20 Apr 2026 09:54:01 +0800 Message-ID: <154f55bf-aa67-406b-bcd7-1306b408be81@linux.alibaba.com> Date: Mon, 20 Apr 2026 09:54:00 +0800 X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] erofs-utils: libzstd: fix undefined behavior shift in setdictsize To: Nithurshen , linux-erofs@lists.ozlabs.org Cc: xiang@kernel.org References: <20260419131604.95875-1-nithurshen.dev@gmail.com> <20260419131604.95875-2-nithurshen.dev@gmail.com> From: Gao Xiang In-Reply-To: <20260419131604.95875-2-nithurshen.dev@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2026/4/19 21:16, Nithurshen wrote: > In erofs_compressor_libzstd_setdictsize(), if pclustersize_max is 0, How pclustersize_max is 0? explain please?